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H. MARSTALL. SAW SETTING MACHINE.-

. No, 291,917. Patented J an. 15, 1884.

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(ModeL) H. MAYRSTALL. I 'SAW SETTING MACHINE.

N0. Z91,91'7. 7 Patented Jan. 15,1884.

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HER-MANN llIARSTALL, OF EVANCVILLE, INDIANA.

SAW-SETTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 291,917, dated January15,1884.

Application filed July 16, 1883. ()loilcl.)

To all whom, it 72mg concern.-

Be it known that I, HERMANN illAns'riiLL, a citizen of the UnitedStates, residing at Evansville, in the county of Vauderburg and State ofIndiana, have invented certain new and useful Improvements inSaw-Setting Machines; and I do hereby declare that the following is afull, clear, and exact description of the same, referencebeing had tothe annexed drawings, making a part of this specification, and to theletters and figures of reference marked. thereon.

Figure 1 of the drawings is a perspective view of my invention; Fig. 2,a front elevation, and Fig. 3 a top plan view, of the same. Fig. 4 is adetail View of the mechanism for operating the pivoted rack-plates.

This invention relates to certain new and useful improvements insaw-sets, the object thereof being to produce such a device that will besimple in its construction, easy and effective in its operation, andcapable of setting band-saws in much less time than is usually requiredto perform the work by hand or with such machines as may be already inuse for the same purpose. These objects I attain by the constructionsubstantially as shown in the accompanying drawings, and hereinaftermore fully described.

In the drawings, A represents a suitable base supporting the frame andoperative parts of the invention. Secured to this base A are standardsB, having 3' ournaled therein the shaft of a cam-wheel, O, operated by acrank, D. This cam-wheel, when revolved, aetuates a punch, E, sliding insuitable slots in the standards B, said slots forming guides, andthepunch, when released from said cam-wheel, is caused to forciblystrike the saw-teeth by means of a spring, F, connected to said punchand to the baseA and one of the standards B, the saw being placedbetween friction-rollers G and H, the latter being beveled upon itsupper portion to form an anvil. These friction-rollers are operated bygear-wheels I, placed upon their respective vertical shafts K L, andmeshing with each other, said shaft L being also provided with aratchet-Wheel, M, meshing with rack-plates N, )ivotally secured in asliding bar, 0, working in guides P, and operated by an eccentric, B,upon the end of the camwheels shaft engaging with an upwardly-extendingarm, a. secured to said sliding bar. This eccentric R is provided with acam, 1), against which bears the upper end of a lever, W, said leverbeing pivoted to lugs i on the standard B, and its lower end extendingdown between the springs c and sliding bar 0, as shown in Fig. at. \Vhenthe cam moves in the proper direction, the lower end of the'pivotedlever IV will actuate the springs c, which are secured to a projection,(1, upon the base A, and to the back of the pivoted rack-bar N, therebyautomaticallythrowing said rack-bar in and out of gear with theratchet-wheel M, secured to the vertical shaft L, at each revolution ofthe cam-wheel 0, thus giving motion, through the medium of the gears I,to the friction-rollers Gr H to move the saw forward after being struckby the punch, a spring, S, secured to the base and to the sliding bar,acting to bring the latter into position after the disengagement of therack-bar with the ratchet-wheel, ready for the next revolution of thecam-wheel. hen desired to set a saw, the same is placed in positionbetween the fric tion-rollers, so that the punch will strike fullagainst the teeth. Then the thumb-screw e is tightened, so that said sawis held fast and prevented from slipping. The saw, when thus placed inposition between the friction-rollers, is supported by a pivoted lever,T,'held in place by a set-screw, f, so that the weight of said saw willnot lower the same while the setting is being accomplished. The crank Dis operated by the right hand, while the left is placed upon a knob, y,secured to a cam, V, which is used to regulate the feed of the sawaccording to the distance of the teeth thereon, said cam engaging with astop, 71, projecting from the sliding bar 0, and is turned to the rightor left at the will of the operator to govern the feed of the saw.

By the use of a device constructed as above 1 described, I am enabled toset a band-saw at the rate of from eighteen to twenty feet in from tento fifteen minutes, or in about onefourth the time required toaccomplish the same result by hand.

Having now fully described my invention,

what I claim, and desire to secure by Letters Patent, is-

1. A machine for setting band-saws, consisting of a suitable base havingsecured thereto standards B, a cam-wheel, 0, having its shaft journaledin said standards and operated by a crank, D, a punch, E, actuated bythecamwheel, friction-rollers G H, and pivoted lever T, to propel andsupport the saw, a cam, V, for regulating the feed of said saw, andsuitable mechanism for operating the frictionrollers at each revolutionof the CLLI]1-W11661, all combined substantially as described, and forthe purpose set forth.

2. The combination of the gear-wheels I, arranged upon parallel verticalshafts K L, to mesh with one another, and a ratchet-wheel, M, upon theshaft L, with a rack-plate, N, pivotally secured in a sliding bar, 0,having an upwardly-extending arm, a, the eccentric R, secured to the endof the main shaft, and provided with a cam, b, and suitablespringinechanism for operating said rack-plate, substantially as and forthe purpose specified.

3. The punch E, adapted to slide in slots in the standards 13, andactuated by the camwheel 0, in combination with the spring F and thefriction-rollers G H, substantially as and for the purpose described.

4. The friction-rollers G H, arranged upon the upper ends of parallelvertical shafts K L,

the roller H, beveled upon its upper portion to form an anvil incombinationwith the punch E, cam-wheel C, gear-wheels I, and means,substantially as described, for operating said gearwheels, as and forthe purpose set forth.

5. The sliding bar 0, adapted to work in guides I upon the base A, andprovided with an arm, a, in combination with the rack-plate N, pivotedtherein, the spring S, and the mechanism, substantially as described,for operating said rack-plate, as and for the purpose specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

HERMANX MARSTA'LL.

i t nesses:

J. H ENRY Soinirrs, AN'rn'oNY DIETRIUH.

